What’s Vulnerable › Vulnerabilities

CVE-2023-2159: CMP – Coming Soon & Maintenance <= 4.1.7 - Maintenance Mode Bypass

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-09 · updated 2026-06-17
• Weakness: CWE-284

Description

The CMP – Coming Soon & Maintenance plugin for WordPress is vulnerable to Maintenance Mode Bypass in versions up to, and including, 4.1.7. A correct cmp_bypass GET parameter in the URL (equal to the md5-hashed home_url in the default setting) allows users to visit a site placed in maintenance mode thus bypassing the plugin's provided feature.

Affected products

• niteo CMP – Coming Soon & Maintenance Plugin by NiteoThemes: before 4.1.8 — fixed in 4.1.8

How to fix

Upgrade to a fixed version: niteo CMP – Coming Soon & Maintenance Plugin by NiteoThemes 4.1.8. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/cmp-coming-soon-maintenance/tags/4.1.6/niteo-cmp.php#L808
• https://plugins.trac.wordpress.org/changeset/2900571/cmp-coming-soon-maintenance/tags/4.1.8/cmp-advanced.php?old=2873620&old_path=cmp-coming-soon-maintenance%2Ftags%2F4.1.7%2Fcmp-advanced.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/af955f69-b18c-446e-b05e-6a57a5f16dfa?source=cve
• https://plugins.trac.wordpress.org/browser/cmp-coming-soon-maintenance/tags/4.1.6/niteo-cmp.php#L808
• https://plugins.trac.wordpress.org/changeset/2900571/cmp-coming-soon-maintenance/tags/4.1.8/cmp-advanced.php?old=2873620&old_path=cmp-coming-soon-maintenance%2Ftags%2F4.1.7%2Fcmp-advanced.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/af955f69-b18c-446e-b05e-6a57a5f16dfa?source=cve

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